Guitar controller for a music synthesizer



FIG. 1 is a top, front and left side perspective view of a guitar controller for a music synthesizer showing my new design, the rear being plain and unornamented;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof; and,

FIG. 4 is a front elevational view thereof. 

The ornamental design for a guitar controller for a music synthesizer, as shown and described. 